Magnetization reversal studies of continuous and patterned exchange biased NiFe/FeMn thin films

J. Mohanty; S. Vandezande; S. Brems; M. J. Van Bael; T. Charlton; S. Langridge; R. M. Dalgliesh; K. Temst; C. Van Haesendonck

doi:10.1007/s00339-012-7031-2

Magnetization reversal studies of continuous and patterned exchange biased NiFe/FeMn thin films

J. Mohanty, S. Vandezande, S. Brems, M. J. Van Bael, T. Charlton, S. Langridge, R. M. Dalgliesh, K. Temst, C. Van Haesendonck

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Abstract

In this article we present a detailed investigation of the structural and magnetic properties of exchange biased NiFe (ferromagnet)/FeMn (antiferromagnet) thin films. The influence of the shape anisotropy on exchange bias and the magnetization reversal mechanism in a sample with patterned lines is compared with a continuous two-dimensional reference sample. Polarized neutron reflectivity (PNR) is employed to study the magnetization reversal by analyzing the spin-flip and non-spin-flip reflectivities. PNR measurements show that the magnetization reversal in the reference two-dimensional film and patterned lines is by domain wall motion rather than coherent rotation of magnetization.

Original language	English
Pages (from-to)	181-187
Number of pages	7
Journal	Applied Physics A: Materials Science and Processing
Volume	109
Issue number	1
DOIs	https://doi.org/10.1007/s00339-012-7031-2
State	Published - Oct 2012
Externally published	Yes

Funding

We thank Mr. B. Opperdoes for his help in MBE growth. This work has been supported by the FWO and GOA/09/006 research programs. We acknowledge an STFC grant for access to the ISIS experimental facility.

Funders	Funder number
Fonds Wetenschappelijk Onderzoek	GOA/09/006

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abstract = "In this article we present a detailed investigation of the structural and magnetic properties of exchange biased NiFe (ferromagnet)/FeMn (antiferromagnet) thin films. The influence of the shape anisotropy on exchange bias and the magnetization reversal mechanism in a sample with patterned lines is compared with a continuous two-dimensional reference sample. Polarized neutron reflectivity (PNR) is employed to study the magnetization reversal by analyzing the spin-flip and non-spin-flip reflectivities. PNR measurements show that the magnetization reversal in the reference two-dimensional film and patterned lines is by domain wall motion rather than coherent rotation of magnetization.",

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AU - Mohanty, J.

AU - Vandezande, S.

AU - Brems, S.

AU - Van Bael, M. J.

AU - Charlton, T.

AU - Langridge, S.

AU - Dalgliesh, R. M.

AU - Temst, K.

AU - Van Haesendonck, C.

PY - 2012/10

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N2 - In this article we present a detailed investigation of the structural and magnetic properties of exchange biased NiFe (ferromagnet)/FeMn (antiferromagnet) thin films. The influence of the shape anisotropy on exchange bias and the magnetization reversal mechanism in a sample with patterned lines is compared with a continuous two-dimensional reference sample. Polarized neutron reflectivity (PNR) is employed to study the magnetization reversal by analyzing the spin-flip and non-spin-flip reflectivities. PNR measurements show that the magnetization reversal in the reference two-dimensional film and patterned lines is by domain wall motion rather than coherent rotation of magnetization.

AB - In this article we present a detailed investigation of the structural and magnetic properties of exchange biased NiFe (ferromagnet)/FeMn (antiferromagnet) thin films. The influence of the shape anisotropy on exchange bias and the magnetization reversal mechanism in a sample with patterned lines is compared with a continuous two-dimensional reference sample. Polarized neutron reflectivity (PNR) is employed to study the magnetization reversal by analyzing the spin-flip and non-spin-flip reflectivities. PNR measurements show that the magnetization reversal in the reference two-dimensional film and patterned lines is by domain wall motion rather than coherent rotation of magnetization.

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Magnetization reversal studies of continuous and patterned exchange biased NiFe/FeMn thin films

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